Question
PSLE
The average height of a group of children was 150.1 cm. When Mr Ng measured and recorded the height of these children, he wrongly recorded one child's height as 149 cm when it should have been 194 cm. As a result, Mr Ng calculated the average height as 145.1 cm. How many children were there in the group?
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PSLE
The average height of a group of children was 150.1 cm. When Mr Ng measured and recorded the height of these children, he wrongly recorded one child's height as 149 cm when it should have been 194 cm. As a result, Mr Ng calculated the average height as 145.1 cm. How many children were there in the group?